This document discusses cognitive mapping as a method to transform tacit knowledge into explicit knowledge. It defines cognitive maps as graphical representations of mental models that can codify a person's knowledge. The document outlines how cognitive maps are constructed by collecting information from pre-existing and new data, and coding it in the form of a map. It discusses different types of elements that can be included in cognitive maps, such as goals, critical success factors, and actions. The document also presents a case study that used cognitive mapping to externalize the mental models of business strategies for a unique portfolio of projects.